// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Expects a call data of [0xFF; 32] and executes the test vectors from
//! [https://www.evm.codes/?fork=cancun#37] and some additional tests.

#![no_std]
#![no_main]
include!("../panic_handler.rs");

use uapi::{HostFn, HostFnImpl as api};

const TEST_DATA: [u8; 32] = [
	255, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
	255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
];

#[no_mangle]
#[polkavm_derive::polkavm_export]
pub extern "C" fn deploy() {}

#[no_mangle]
#[polkavm_derive::polkavm_export]
pub extern "C" fn call() {
	let mut buf = [0; 32];

	api::call_data_copy(&mut &mut buf[..], 0);
	assert_eq!(buf, [255; 32]);

	api::call_data_copy(&mut &mut buf[..8], 31);
	assert_eq!(buf, TEST_DATA);

	api::call_data_copy(&mut &mut buf[..], 32);
	assert_eq!(buf, [0; 32]);

	let mut buf = [255; 32];
	api::call_data_copy(&mut &mut buf[..], u32::MAX);
	assert_eq!(buf, [0; 32]);
}
